The introduction to this intriguing exercise and article begins “If a ball bounces an infinite number of times, it must take an infinite amount of time to finish bouncing!” This piece appeared in The Journal of Online Mathematics and Its Applications in May 2007, and it was authored by Robert Styer and Morgan Besson of Villanova University. This particular article and its accompanying teaching module “explore the time and distance of a bouncing ball and leads to a study of the geometric series.” Along with the actual article, this site also includes a video clip and several interactive Flash mathlets. It’s a fun way to get students thinking about geometric series, and mathematics educators will definitely want to tell colleagues about the site as well